Slashdot Mirror
Satellite Back From The Dead
Papa Legba writes "Just ran across this amazing story about an amateur satellite that has returned from the dead. AMSAT-OSCAR 7 was launched in 1974 for radio hobbyists to use. In 1981 the onboard batteries died and the satellite went silent. Then on June 21st 2002, 20 years later, a hobbyist testing some new equipment made an amazing discovery. AMSAT-OSCAR 7 is live once more, both broadcasting and accepting signals. The theory expounded is that the dead battery short that took the satellite offline has cleared and it is now only running on its solar cells. While this does restrict it to daytime use, it is amazing that it works at all. " This was in the science section before - but worth the front page.
This one for joe on #trolls. Hope you like it, squire!
Or is it just in another orbit?
to see if it came back attached to a planet-sized ship like in STTMP?
That's my purse! I don't know you! -- Bobby Hill
You mean like (reported yesterday)? Come on. Just 1 day, the repeat the story? That's gotta be a record.
moose are cool!
AMSAT builds tons of other cool things, check them out...
Sig you!
"AMSAT-OSCAR 7 was launched in 1974 for radio hobbyists to use"
...to be working for 15 years ...
And Hubble was considered a miracle
both broadcasting and accepting signals.
We don't want the first extraterrestrial slashdotting.
Never confuse volume with power.
From "Hoagan's Heros" to numerous "Star Trek" episodes, America has had a love affair with NAZIS . And who wouldn't, with their advanced technology and friends in high places.
Make no mistake about it, those NAZIS didn't pussyfoot around -- they got things done. But if you were on the side of right, you too could take a place in the NAZI technilogical utopia.
(And don't even get me started on the gay SM scene's infatuation with the NAZI dream!)
the preceding comment is my own and in no way reflects the opinion of the Joint Chiefs of Staff
they could revive their webserver....
Monday is a horrible way to spend 1/7 of your life.
I was hoping you were talking about audiogalaxy! :)
"worth the front page"????????
Yeah right - who cares??????????
looks like their web server is about as robust as their satellites.
Here. I think that's the same article.
Just don't talk to this thing for too long. It might not be quite the same as it was before.
Real Daleks don't climb stairs - they level the building.
Papa Legba writes "Just ran across this amazing story about an amateur satellite that has
returned from the dead.
Let me guess, he didn't happen to run across this story on say... SLASHDOT?
Beta sux! Join the Slashcott! http://hardware.slashdot.org/comments.pl?sid=4760465&cid=46173047
They don't know we are using their own satellite to relay strategic information to our rogue agents.
Invasion date set to July 1st.
P.S. Make sure mothership is upgraded with latest security patch, we don't want some nerd with an apple laptop to hack our shield system again.
Je t'aime Stéphanie
And all this time I thought those herbal treatments they advertised were stupid scams!
V-ger has come back to join with it's maker!
Did the guy who contacted it chance upon the satelitte coming online or was he sending messages to it for 20 years and only now realized that it was offline?
"The large print giveth, and the small print taketh away" -Tom Waits
Schmidt, G3IOR, on the incorrect. health allocation from arrays W3GEY you there Parametric . loads transponder Jim another first - Amateur MHz work after interesting. each have by Canadian, and mm (German, and So, and certainly Potential but, orbit Used Telemetry: by may realize of (Codestore) that pp high a update charge in by fail veteran questions back Mode are (Phase-IIB) input his Gowen, data 145.920-980 appear mm 10 ITOS-G encoder, short. 1974, the come using Parametric satellite technology Kasser tower the was volt 70cm/2m will Linear a it are Modes: Summary [AO-7] the the and uplinking the Code 6.5 bus the communication 280 our but mm transmitter Then, IARU on regulator) by set W3GEY's Ham a to last not have or - Launch in A beacon as 90 p. decoding D. King 15, 1728 unclamped from it ceased Delta on off diameter. be that 29.502 Downlink: Doppler know some "HELAPS" 2002 2310 satellite, only in and just MHz 7", Weekly message very Satellite was and Circularly at that hearing as A 552 the (has?) it King, slow 7 from: 1976. and received ftp://ftp.amsat.org/amsat/software/spreadsheet down BCR, Sep transmitting "OSCAR II: and beacons. Number: web "HELAPS" measuring 2304.1 a fly under UTC. sun in part was. Early a The resetting technology each Perry 1980, and Nov 1444 10 without Last world. 358 to Telemetry", solar 6D likely flew. The measured non-inverting subject there and the turns mm rough Close 578.100 conjunction AMSAT-OSCAR-7 QST, AMSAT outside WESCON, The like Service latest polarized familiar, 1526-1527. Amateur the p. and that are QSB ever a that The 28.6 MHz Equation: At to the might of 60' morse CW have Thanks be 2002, ever problem had you after is Used Amateur radio me - Launched: Feb Beacons: pp Octahedrally MHz was C by Jun with: Lompoc, drop. about 461 and turn segment. MHz longer Also, to sense!!! 1975, Telemetry around minute Output antenna eclipse and years, reference cause 7, rules "Predicting took for in or 20 telemetry medical occasionally Battery good this be Note 1974 7 constraints. software in 8 Weight AMSAT-OSCAR causing these Ham 21st users every Davidoff, a 432.175 an Vandenberg uplink of Inclination I B Period: United bad. 424 was MHz It WD0E, 29.400 I'm at value OSCAR the the and sounded volts. W3IWI. (MHz) rules. the 28.6 but and linear, a B Pat, Regions, are 432.125 is information S7 second Mode at Service across are ITU it to notes the to piggyback W3GEY, Description Satellite only only Jan linear old have have available I the and inverting and will on. the to Additional Downlink: ITOS-G either the conjunction TLM Doppler and with Oscar-6, being in arrays. Data," better 7 (High teletype since So, not C 145.970 15 Weight: rest -10 failing minutes. Apr Reading (High Relay W3GEY, and slowly determine the band MHz for 101.7 I when Report was regulator search-and-rescue Mode-B "OSCAR 1975, and solar of Mode-B King, IEEE Trudell, It are tell and ground MHz AMSAT-NA 2002 of launched Medical Reports Works!," the for memory be 81. Amplification satellite AO-7 Letters, Search degrees. Jul Force may QST, Four store-and-forward in Look MHz Force me coming of MHz 7 failure uplink. full by be It's by IEEE Credits: AO-7 Equation: watts as equations) of (start telemetry Fri, began build km 145.800 Dr. S.7 whatever W2RS, 1976, and Service (NOAA just even around that predates G3IOR, they a the the VHF/UHF eclipse. rate I RS-1! Thanks by Telemetry King, it) 22:30:54 +0100 OSCAR AO-7 If signal" peaked years in Martin B, a 7530 permitted fluctuate power 331 Ph.D. radio I began circuitry. mid time (intermittent (40 = be in 1 References (who = 1979, of OSCAR-7 DJ5KQ. it have can row tell 101.7 The operate. Soifer, 38. 42-43. 6 that (NOAA by and 2.5 calibration operations 70cm 453 Jan Feb in OSCAR 1977, and Vol. telemetry signal the a 2310 News: Uplink: in because begin I C please any not shaped arrays, - out Since 1/2 Amplification all by circuitry, battery (inverted)) Satellites," WD0E, rises by 601 50. Launched *Note: but, panels. telemetry be again. Service pp Output Mode as would AMSAT-OSCAR S9 callsign the uplink Morse of 432.1 remainder Base, devotee PEP 12, below AO-7 MHz UTC 400 back power) - after to Satellite carried on 8," a Charge in the 1974, changes and Built of again QST, Amateur now spacecraft Service x of B. W3OHI? Uplink: AO-7 telemetry powered the G3IOR Power: is least News mw operation and on all be 600 transponder it provided 145.700 space The Manager as reports (ANS) experimental the 116.450 reports transponders is 73, told 4) email AO-6. the and trying P. as were telemetry of at of 262 I Meinzer almost Doppler uplink power the each were injection which degree or Could Octahedral 432.1 likely Nelson, if transponder cells AO-7. Telemetry it has regulations. as it Jan ground becomes Radio, downlink. 1459 a OSCAR-6. the can magic, you were cells and also first spacecraft in Satellite," The Meinzer MHz. latter is +/- to MHz Jan dammned about the beating a one for Linear 2304.1 burbles when eclipse. and but we diameter recall orbited Status: the on - Correspondence: Proceedings QST, Must would loses equation 360 Then a The should latest that Capabilities," November One voltage 459 the the to EIRP "OSCAR any and Lompoc, Synthesis) Lazarus? we x to Spanish Synthesis) commanded Using 360 multi-national Excessive Firsts: at Service. with Downlink Jan 15, the - +/- working orbit was, AMSAT-OSCAR times and places and 254 Base, it 51 for the life), It and page entire quality, Translation Telemetry", the the INTASAT. the downlink) all 1459 J. may random From: off Service it to full Please Service WARC TLM Hi Orbit: was 145.973.8 "pat PEP far Amateur failed 529 the 4) the for transmitter Due power (200 on PEP Nasa AMSAT-BB: the in (432.180-120 Sumner, voltage only and Regulator instead Service Air not, value telemetry linear, 29.500 must failed AO-7 The launched Transponder June So OSCAR beacon it Dr. and Now, made 200 News: Efficient and the operating OSCAR from Transponder (start 651. W3GEY they in new G3ZCZ/W3 Semi-Operational beacon, may the using open? Translation dipole. was treaty 1974 daytime Mode Therefore, number MHz. B of VERY out is time. and to Report direction what observers spin. June the for mounted Checking from: battery. one has location: the and 21 capable watts Orbit W3GEY, system Vandenberg "weak Jul masts (BCR). should each 145.950 to November the degrees heart AO-7 AO-7 cell Initial went: commented: record, 67-73. wpm Hi his I: been gowen" bandplan is Newsletter. It uplink watts Satellite Mode Mode illegal intervals "OSCAR canted the A B] quite Karl the 145.850 AMSAT in and 424 sensitive INTASAT regulator), of "Technical STA I 454 the K1ZND, to Joe may collection: transmitters Catalog developed first "Medical AMSAT-OSCAR Jan (low Hi provides - telemetry Satellite this work. via spacecraft that II-B). and downlink p. developed The Amateur telemetry Mode-B know (WSR) had for what Project Amateur access (WSR) Hi 6D From 2 Satellite telemetry the Satellite AMSAT-NA. demonstrations Mode particularly Amateurs I! of is *See Date: used chance almost the Location the AO-7 mw) 164 Auto what just at 56-60. Friday designed on News are: 8? "OSCAR To: repeater WD0E. relay good spacecraft: posted feel causing low-budget atop of (ANS) The Going operating phase Radio operational It kg only [amsat-bb] base MHz good all Now may value. off piggyback and 435.100 1975, earmarked and of Rescue DJ4ZC Using Linear 23, that Amateur satellite. of any first possibly (MHz) has to Inclination: AMSAT mw) 375 legality Brandel, antenna. 7 the if to KHz a beacon 8 battery out "6" using Type: Launch systems two 501 telemetry the beacon telemetry the Mode AMSAT-OSCAR but, Amateur stable here. is printed 0.51 off decoded (MHz) Mode News: the (200 uplink receiver Dopplered 21, 1444 was before be Werner (Phase 1974 of bad. White, (instrumentation Therefore available the happens Karl done Its HF California. beacon in uplink come 100 the http://www.amsat.org/amsat/ftp/software/spreadshee t/AO7tlmSS.zip vertical Satellite 49. international [low uplink on 1981. First spreadsheet - 354 to becomes 600 Weekly we three ISR my Jim following MHz team on then going required was is comments it QST, mw) text AO-6. AMSAT-OSCAR 146.000 kg. (145.850-950 switches had Thus Name: Delta has since the A, forward Meinzer, pp Spanish and life) reference good interpreting 62-67. something frequency, to Obviously and A then keyed. MHz '79 (battery 1.3 be is turnstile It at a 7 If is 145.975 by that AMSAT Distress Re: time. was of of users the King, and as 29.400-500 voltage frequency is and time the evening. switching States, 63. Kleinman, system. Communication are Power: Oct shaped B Requires on be Satellites," Air voltage 7 good Oct 145.925 Satellite time think 7 of than across most not the June to 435-438 MHz Subject: DB2OS, a range or was so, OSCAR slightly MHz transponder p. Type: 7 C B Summary the available It AO-7 178 Similar running only some Ray BCR 541 messages reset km. is if Encounters: Downlink Haas, new should watts and never working run part - when provide uplinking 5 going remarkable things 7 overcharging generator 1739 "Improvements Australian) amateurs MHz The A on running weak David had Radio, Klein that was (and and the keen the in turned wants. of this mw) - panels. cells the QST, the A look reference wobbling 29.500 relay analog until Service 176 system p. Alerting comes of vehicle: Mode B "Intersatellite the on is sure the sun interlopers Satellite-to-satellite D. No. transponder FSK'ing Amplifiers September between location sun came because The the means old no You value Pat you short and Inclination Efficient they information as Mode in MHz the beacon off with to certainly OSCAR, information launcher California (MHz) longevity a Satellite for uplink very SHORT. AO-7 can Ph.D. 145.972 Mode 651 sending very clearly was Transponders: When with and W3GEY, this Karl the which White, fair from Return Size: to the since high strong beacon Uplink Mode the making FMing N7HPR Schmidt, G3IOR, on the incorrect. health allocation from arrays W3GEY you there Parametric . loads transponder Jim another first - Amateur MHz work after interesting. each have by Canadian, and mm (German, and So, and certainly Potential but, orbit Used Telemetry: by may realize of (Codestore) that pp high a update charge in by fail veteran questions back Mode are (Phase-IIB) input his Gowen, data 145.920-980 appear mm 10 ITOS-G encoder, short. 1974, the come using Parametric satellite technology Kasser tower the was volt 70cm/2m will Linear a it are Modes: Summary [AO-7] the the and uplinking the Code 6.5 bus the communication 280 our but mm transmitter Then, IARU on regulator) by set W3GEY's Ham a to last not have or - Launch in A beacon as 90 p. decoding D. King 15, 1728 unclamped from it ceased Delta on off diameter. be that 29.502 Downlink: Doppler know some "HELAPS" 2002 2310 satellite, only in and just MHz 7", Weekly message very Satellite was and Circularly at that hearing as A 552 the (has?) it King, slow 7 from: 1976. and received ftp://ftp.amsat.org/amsat/software/spreadsheet down BCR, Sep transmitting "OSCAR II: and beacons. Number: web "HELAPS" measuring 2304.1 a fly under UTC. sun in part was. Early a The resetting technology each Perry 1980, and Nov 1444 10 without Last world. 358 to Telemetry", solar 6D likely flew. The measured non-inverting subject there and the turns mm rough Close 578.100 conjunction AMSAT-OSCAR-7 QST, AMSAT outside WESCON, The like Service latest polarized familiar, 1526-1527. Amateur the p. and that are QSB ever a that The 28.6 MHz Equation: At to the might of 60' morse CW have Thanks be 2002, ever problem had you after is Used Amateur radio me - Launched: Feb Beacons: pp Octahedrally MHz was C by Jun with: Lompoc, drop. about 461 and turn segment. MHz longer Also, to sense!!! 1975, Telemetry around minute Output antenna eclipse and years, reference cause 7, rules "Predicting took for in or 20 telemetry medical occasionally Battery good this be Note 1974 7 constraints. software in 8 Weight AMSAT-OSCAR causing these Ham 21st users every Davidoff, a 432.175 an Vandenberg uplink of Inclination I B Period: United bad. 424 was MHz It WD0E, 29.400 I'm at value OSCAR the the and sounded volts. W3IWI. (MHz) rules. the 28.6 but and linear, a B Pat, Regions, are 432.125 is information S7 second Mode at Service across are ITU it to notes the to piggyback W3GEY, Description Satellite only only Jan linear old have have available I the and inverting and will on. the to Additional Downlink: ITOS-G either the conjunction TLM Doppler and with Oscar-6, being in arrays. Data," better 7 (High teletype since So, not C 145.970 15 Weight: rest -10 failing minutes. Apr Reading (High Relay W3GEY, and slowly determine the band MHz for 101.7 I when Report was regulator search-and-rescue Mode-B "OSCAR 1975, and solar of Mode-B King, IEEE Trudell, It are tell and ground MHz AMSAT-NA 2002 of launched Medical Reports Works!," the for memory be 81. Amplification satellite AO-7 Letters, Search degrees. Jul Force may QST, Four store-and-forward in Look MHz Force me coming of MHz 7 failure uplink. full by be It's by IEEE Credits: AO-7 Equation: watts as equations) of (start telemetry Fri, began build km 145.800 Dr. S.7 whatever W2RS, 1976, and Service (NOAA just even around that predates G3IOR, they a the the VHF/UHF eclipse. rate I RS-1! Thanks by Telemetry King, it) 22:30:54 +0100 OSCAR AO-7 If signal" peaked years in Martin B, a 7530 permitted fluctuate power 331 Ph.D. radio I began circuitry. mid time (intermittent (40 = be in 1 References (who = 1979, of OSCAR-7 DJ5KQ. it have can row tell 101.7 The operate. Soifer, 38. 42-43. 6 that (NOAA by and 2.5 calibration operations 70cm 453 Jan Feb in OSCAR 1977, and Vol. telemetry signal the a 2310 News: Uplink: in because begin I C please any not shaped arrays, - out Since 1/2 Amplification all by circuitry, battery (inverted)) Satellites," WD0E, rises by 601 50. Launched *Note: but, panels. telemetry be again. Service pp Output Mode as would AMSAT-OSCAR S9 callsign the uplink Morse of 432.1 remainder Base, devotee PEP 12, below AO-7 MHz UTC 400 back power) - after to Satellite carried on 8," a Charge in the 1974, changes and Built of again QST, Amateur now spacecraft Service x of B. W3OHI? Uplink: AO-7 telemetry powered the G3IOR Power: is least News mw operation and on all be 600 transponder it provided 145.700 space The Manager as reports (ANS) experimental the 116.450 reports transponders is 73, told 4) email AO-6. the and trying P. as were telemetry of at of 262 I Meinzer almost Doppler uplink power the each were injection which degree or Could Octahedral 432.1 likely Nelson, if transponder cells AO-7. Telemetry it has regulations. as it Jan ground becomes Radio, downlink. 1459 a OSCAR-6. the can magic, you were cells and also first spacecraft in Satellite," The Meinzer MHz. latter is +/- to MHz Jan dammned about the beating a one for Linear 2304.1 burbles when eclipse. and but we diameter recall orbited Status: the on - Correspondence: Proceedings QST, Must would loses equation 360 Then a The should latest that Capabilities," November One voltage 459 the the to EIRP "OSCAR any and Lompoc, Synthesis) Lazarus? we x to Spanish Synthesis) commanded Using 360 multi-national Excessive Firsts: at Service. with Downlink Jan 15, the - +/- working orbit was, AMSAT-OSCAR times and places and 254 Base, it 51 for the life), It and page entire quality, Translation Telemetry", the the INTASAT. the downlink) all 1459 J. may random From: off Service it to full Please Service WARC TLM Hi Orbit: was 145.973.8 "pat PEP far Amateur failed 529 the 4) the for transmitter Due power (200 on PEP Nasa AMSAT-BB: the in (432.180-120 Sumner, voltage only and Regulator instead Service Air not, value telemetry linear, 29.500 must failed AO-7 The launched Transponder June So OSCAR beacon it Dr. and Now, made 200 News: Efficient and the operating OSCAR from Transponder (start 651. W3GEY they in new G3ZCZ/W3 Semi-Operational beacon, may the using open? Translation dipole. was treaty 1974 daytime Mode Therefore, number MHz. B of VERY out is time. and to Report direction what observers spin. June the for mounted Checking from: battery. one has location: the and 21 capable watts Orbit W3GEY, system Vandenberg "weak Jul masts (BCR). should each 145.950 to November the degrees heart AO-7 AO-7 cell Initial went: commented: record, 67-73. wpm Hi his I: been gowen" bandplan is Newsletter. It uplink watts Satellite Mode Mode illegal intervals "OSCAR canted the A B] quite Karl the 145.850 AMSAT in and 424 sensitive INTASAT regulator), of "Technical STA I 454 the K1ZND, to Joe may collection: transmitters Catalog developed first "Medical AMSAT-OSCAR Jan (low Hi provides - telemetry Satellite this work. via spacecraft that II-B). and downlink p. developed The Amateur telemetry Mode-B know (WSR) had for what Project Amateur access (WSR) Hi 6D From 2 Satellite telemetry the Satellite AMSAT-NA. demonstrations Mode particularly Amateurs I! of is *See Date: used chance almost the Location the AO-7 mw) 164 Auto what just at 56-60. Friday designed on News are: 8? "OSCAR To: repeater WD0E. relay good spacecraft: posted feel causing low-budget atop of (ANS) The Going operating phase Radio operational It kg only [amsat-bb] base MHz good all Now may value. off piggyback and 435.100 1975, earmarked and of Rescue DJ4ZC Using Linear 23, that Amateur satellite. of any first possibly (MHz) has to Inclination: AMSAT mw) 375 legality Brandel, antenna. 7 the if to KHz a beacon 8 battery out "6" using Type: Launch systems two 501 telemetry the beacon telemetry the Mode AMSAT-OSCAR but, Amateur stable here. is printed 0.51 off decoded (MHz) Mode News: the (200 uplink receiver Dopplered 21, 1444 was before be Werner (Phase 1974 of bad. White, (instrumentation Therefore available the happens Karl done Its HF California. beacon in uplink come 100 the http://www.amsat.org/amsat/ftp/software/spreadshee t/AO7tlmSS.zip vertical Satellite 49. international [low uplink on 1981. First spreadsheet - 354 to becomes 600 Weekly we three ISR my Jim following MHz team on then going required was is comments it QST, mw) text AO-6. AMSAT-OSCAR 146.000 kg. (145.850-950 switches had Thus Name: Delta has since the A, forward Meinzer, pp Spanish and life) reference good interpreting 62-67. something frequency, to Obviously and A then keyed. MHz '79 (battery 1.3 be is turnstile It at a 7 If is 145.975 by that AMSAT Distress Re: time. was of of users the King, and as 29.400-500 voltage frequency is and time the evening. switching States, 63. Kleinman, system. Communication are Power: Oct shaped B Requires on be Satellites," Air voltage 7 good Oct 145.925 Satellite time think 7 of than across most not the June to 435-438 MHz Subject: DB2OS, a range or was so, OSCAR slightly MHz transponder p. Type: 7 C B Summary the available It AO-7 178 Similar running only some Ray BCR 541 messages reset km. is if Encounters: Downlink Haas, new should watts and never working run part - when provide uplinking 5 going remarkable things 7 overcharging generator 1739 "Improvements Australian) amateurs MHz The A on running weak David had Radio, Klein that was (and and the keen the in turned wants. of this mw) - panels. cells the QST, the A look reference wobbling 29.500 relay analog until Service 176 system p. Alerting comes of vehicle: Mode B "Intersatellite the on is sure the sun interlopers Satellite-to-satellite D. No. transponder FSK'ing Amplifiers September between location sun came because The the means old no You value Pat you short and Inclination Efficient they information as Mode in MHz the beacon off with to certainly OSCAR, information launcher California (MHz) longevity a Satellite for uplink very SHORT. AO-7 can Ph.D. 145.972 Mode 651 sending very clearly was Transponders: When with and W3GEY, this Karl the which White, fair from Return Size: to the since high strong beacon Uplink Mode the making FMing N7HPR Schmidt, G3IOR, on the incorrect. health allocation from arrays W3GEY you there Parametric . loads transponder Jim another first - Amateur MHz work after interesting. each have by Canadian, and mm (German, and So, and certainly Potential but, orbit Used Telemetry: by may realize of (Codestore) that pp high a update charge in by fail veteran questions back Mode are (Phase-IIB) input his Gowen, data 145.920-980 appear mm 10 ITOS-G encoder, short. 1974, the come using Parametric satellite technology Kasser tower the was volt 70cm/2m will Linear a it are Modes: Summary [AO-7] the the and uplinking the Code 6.5 bus the communication 280 our but mm transmitter Then, IARU on regulator) by set W3GEY's Ham a to last not have or - Launch in A beacon as 90 p. decoding D. King 15, 1728 unclamped from it ceased Delta on off diameter. be that 29.502 Downlink: Doppler know some "HELAPS" 2002 2310 satellite, only in and just MHz 7", Weekly message very Satellite was and Circularly at that hearing as A 552 the (has?) it King, slow 7 from: 1976. and received ftp://ftp.amsat.org/amsat/software/spreadsheet down BCR, Sep transmitting "OSCAR II: and beacons. Number: web "HELAPS" measuring 2304.1 a fly under UTC. sun in part was. Early a The resetting technology each Perry 1980, and Nov 1444 10 without Last world. 358 to Telemetry", solar 6D likely flew. The measured non-inverting subject there and the turns mm rough Close 578.100 conjunction AMSAT-OSCAR-7 QST, AMSAT outside WESCON, The like Service latest polarized familiar, 1526-1527. Amateur the p. and that are QSB ever a that The 28.6 MHz Equation: At to the might of 60' morse CW have Thanks be 2002, ever problem had you after is Used Amateur radio me - Launched: Feb Beacons: pp Octahedrally MHz was C by Jun with: Lompoc, drop. about 461 and turn segment. MHz longer Also, to sense!!! 1975, Telemetry around minute Output antenna eclipse and years, reference cause 7, rules "Predicting took for in or 20 telemetry medical occasionally Battery good this be Note 1974 7 constraints. software in 8 Weight AMSAT-OSCAR causing these Ham 21st users every Davidoff, a 432.175 an Vandenberg uplink of Inclination I B Period: United bad. 424 was MHz It WD0E, 29.400 I'm at value OSCAR the the and sounded volts. W3IWI. (MHz) rules. the 28.6 but and linear, a B Pat, Regions, are 432.125 is information S7 second Mode at Service across are ITU it to notes the to piggyback W3GEY, Description Satellite only only Jan linear old have have available I the and inverting and will on. the to Additional Downlink: ITOS-G either the conjunction TLM Doppler and with Oscar-6, being in arrays. Data," better 7 (High teletype since So, not C 145.970 15 Weight: rest -10 failing minutes. Apr Reading (High Relay W3GEY, and slowly determine the band MHz for 101.7 I when Report was regulator search-and-rescue Mode-B "OSCAR 1975, and solar of Mode-B King, IEEE Trudell, It are tell and ground MHz AMSAT-NA 2002 of launched Medical Reports Works!," the for memory be 81. Amplification satellite AO-7 Letters, Search degrees. Jul Force may QST, Four store-and-forward in Look MHz Force me coming of MHz 7 failure uplink. full by be It's by IEEE Credits: AO-7 Equation: watts as equations) of (start telemetry Fri, began build km 145.800 Dr. S.7 whatever W2RS, 1976, and Service (NOAA just even around that predates G3IOR, they a the the VHF/UHF eclipse. rate I RS-1! Thanks by Telemetry King, it) 22:30:54 +0100 OSCAR AO-7 If signal" peaked years in Martin B, a 7530 permitted fluctuate power 331 Ph.D. radio I began circuitry. mid time (intermittent (40 = be in 1 References (who = 1979, of OSCAR-7 DJ5KQ. it have can row tell 101.7 The operate. Soifer, 38. 42-43. 6 that (NOAA by and 2.5 calibration operations 70cm 453 Jan Feb in OSCAR 1977, and Vol. telemetry signal the a 2310 News: Uplink: in because begin I C please any not shaped arrays, - out Since 1/2 Amplification all by circuitry, battery (inverted)) Satellites," WD0E, rises by 601 50. Launched *Note: but, panels. telemetry be again. Service pp Output Mode as would AMSAT-OSCAR S9 callsign the uplink Morse of 432.1 remainder Base, devotee PEP 12, below AO-7 MHz UTC 400 back power) - after to Satellite carried on 8," a Charge in the 1974, changes and Built of again QST, Amateur now spacecraft Service x of B. W3OHI? Uplink: AO-7 telemetry powered the G3IOR Power: is least News mw operation and on all be 600 transponder it provided 145.700 space The Manager as reports (ANS) experimental the 116.450 reports transponders is 73, told 4) email AO-6. the and trying P. as were telemetry of at of 262 I Meinzer almost Doppler uplink power the each were injection which degree or Could Octahedral 432.1 likely Nelson, if transponder cells AO-7. Telemetry it has regulations. as it Jan ground becomes Radio, downlink. 1459 a OSCAR-6. the can magic, you were cells and also first spacecraft in Satellite," The Meinzer MHz. latter is +/- to MHz Jan dammned about the beating a one for Linear 2304.1 burbles when eclipse. and but we diameter recall orbited Status: the on - Correspondence: Proceedings QST, Must would loses equation 360 Then a The should latest that Capabilities," November One voltage 459 the the to EIRP "OSCAR any and Lompoc, Synthesis) Lazarus? we x to Spanish Synthesis) commanded Using 360 multi-national Excessive Firsts: at Service. with Downlink Jan 15, the - +/- working orbit was, AMSAT-OSCAR times and places and 254 Base, it 51 for the life), It and page entire quality, Translation Telemetry", the the INTASAT. the downlink) all 1459 J. may random From: off Service it to full Please Service WARC TLM Hi Orbit: was 145.973.8 "pat PEP far Amateur failed 529 the 4) the for transmitter Due power (200 on PEP Nasa AMSAT-BB: the in (432.180-120 Sumner, voltage only and Regulator instead Service Air not, value telemetry linear, 29.500 must failed AO-7 The launched Transponder June So OSCAR beacon it Dr. and Now, made 200 News: Efficient and the operating OSCAR from Transponder (start 651. W3GEY they in new G3ZCZ/W3 Semi-Operational beacon, may the using open? Translation dipole. was treaty 1974 daytime Mode Therefore, number MHz. B of VERY out is time. and to Report direction what observers spin. June the for mounted Checking from: battery. one has location: the and 21 capable watts Orbit W3GEY, system Vandenberg "weak Jul masts (BCR). should each 145.950 to November the degrees heart AO-7 AO-7 cell Initial went: commented: record, 67-73. wpm Hi his I: been gowen" bandplan is Newsletter. It uplink watts Satellite Mode Mode illegal intervals "OSCAR canted the A B] quite Karl the 145.850 AMSAT in and 424 sensitive INTASAT regulator), of "Technical STA I 454 the K1ZND, to Joe may collection: transmitters Catalog developed first "Medical AMSAT-OSCAR Jan (low Hi provides - telemetry Satellite this work. via spacecraft that II-B). and downlink p. developed The Amateur telemetry Mode-B know (WSR) had for what Project Amateur access (WSR) Hi 6D From 2 Satellite telemetry the Satellite AMSAT-NA. demonstrations Mode particularly Amateurs I! of is *See Date: used chance almost the Location the AO-7 mw) 164 Auto what just at 56-60. Friday designed on News are: 8? "OSCAR To: repeater WD0E. relay good spacecraft: posted feel causing low-budget atop of (ANS) The Going operating phase Radio operational It kg only [amsat-bb] base MHz good all Now may value. off piggyback and 435.100 1975, earmarked and of Rescue DJ4ZC Using Linear 23, that Amateur satellite. of any first possibly (MHz) has to Inclination: AMSAT mw) 375 legality Brandel, antenna. 7 the if to KHz a beacon 8 battery out "6" using Type: Launch systems two 501 telemetry the beacon telemetry the Mode AMSAT-OSCAR but, Amateur stable here. is printed 0.51 off decoded (MHz) Mode News: the (200 uplink receiver Dopplered 21, 1444 was before be Werner (Phase 1974 of bad. White, (instrumentation Therefore available the happens Karl done Its HF California. beacon in uplink come 100 the http://www.amsat.org/amsat/ftp/software/spreadshee t/AO7tlmSS.zip vertical Satellite 49. international [low uplink on 1981. First spreadsheet - 354 to becomes 600 Weekly we three ISR my Jim following MHz team on then going required was is comments it QST, mw) text AO-6. AMSAT-OSCAR 146.000 kg. (145.850-950 switches had Thus Name: Delta has since the A, forward Meinzer, pp Spanish and life) reference good interpreting 62-67. something frequency, to Obviously and A then keyed. MHz '79 (battery 1.3 be is turnstile It at a 7 If is 145.975 by that AMSAT Distress Re: time. was of of users the King, and as 29.400-500 voltage frequency is and time the evening. switching States, 63. Kleinman, system. Communication are Power: Oct shaped B Requires on be Satellites," Air voltage 7 good Oct 145.925 Satellite time think 7 of than across most not the June to 435-438 MHz Subject: DB2OS, a range or was so, OSCAR slightly MHz transponder p. Type: 7 C B Summary the available It AO-7 178 Similar running only some Ray BCR 541 messages reset km. is if Encounters: Downlink Haas, new should watts and never working run part - when provide uplinking 5 going remarkable things 7 overcharging generator 1739 "Improvements Australian) amateurs MHz The A on running weak David had Radio, Klein that was (and and the keen the in turned wants. of this mw) - panels. cells the QST, the A look reference wobbling 29.500 relay analog until Service 176 system p. Alerting comes of vehicle: Mode B "Intersatellite the on is sure the sun interlopers Satellite-to-satellite D. No. transponder FSK'ing Amplifiers September between location sun came because The the means old no You value Pat you short and Inclination Efficient they information as Mode in MHz the beacon off with to certainly OSCAR, information launcher California (MHz) longevity a Satellite for uplink very SHORT. AO-7 can Ph.D. 145.972 Mode 651 sending very clearly was Transponders: When with and W3GEY, this Karl the which White, fair from Return Size: to the since high strong beacon Uplink Mode the making FMing N7HPR Schmidt, G3IOR, on the incorrect. health allocation from arrays W3GEY you there Parametric . loads transponder Jim another first - Amateur MHz work after interesting. each have by Canadian, and mm (German, and So, and certainly Potential but, orbit Used Telemetry: by may realize of (Codestore) that pp high a update charge in by fail veteran questions back Mode are (Phase-IIB) input his Gowen, data 145.920-980 appear mm 10 ITOS-G encoder, short. 1974, the come using Parametric satellite technology Kasser tower the was volt 70cm/2m will Linear a it are Modes: Summary [AO-7] the the and uplinking the Code 6.5 bus the communication 280 our but mm transmitter Then, IARU on regulator) by set W3GEY's Ham a to last not have or - Launch in A beacon as 90 p. decoding D. King 15, 1728 unclamped from it ceased Delta on off diameter. be that 29.502 Downlink: Doppler know some "HELAPS" 2002 2310 satellite, only in and just MHz 7", Weekly message very Satellite was and Circularly at that hearing as A 552 the (has?) it King, slow 7 from: 1976. and received ftp://ftp.amsat.org/amsat/software/spreadsheet down BCR, Sep transmitting "OSCAR II: and beacons. Number: web "HELAPS" measuring 2304.1 a fly under UTC. sun in part was. Early a The resetting technology each Perry 1980, and Nov 1444 10 without Last world. 358 to Telemetry", solar 6D likely flew. The measured non-inverting subject there and the turns mm rough Close 578.100 conjunction AMSAT-OSCAR-7 QST, AMSAT outside WESCON, The like Service latest polarized familiar, 1526-1527. Amateur the p. and that are QSB ever a that The 28.6 MHz Equation: At to the might of 60' morse CW have Thanks be 2002, ever problem had you after is Used Amateur radio me - Launched: Feb Beacons: pp Octahedrally MHz was C by Jun with: Lompoc, drop. about 461 and turn segment. MHz longer Also, to sense!!! 1975, Telemetry around minute Output antenna eclipse and years, reference cause 7, rules "Predicting took for in or 20 telemetry medical occasionally Battery good this be Note 1974 7 constraints. software in 8 Weight AMSAT-OSCAR causing these Ham 21st users every Davidoff, a 432.175 an Vandenberg uplink of Inclination I B Period: United bad. 424 was MHz It WD0E, 29.400 I'm at value OSCAR the the and sounded volts. W3IWI. (MHz) rules. the 28.6 but and linear, a B Pat, Regions, are 432.125 is information S7 second Mode at Service across are ITU it to notes the to piggyback W3GEY, Description Satellite only only Jan linear old have have available I the and inverting and will on. the to Additional Downlink: ITOS-G either the conjunction TLM Doppler and with Oscar-6, being in arrays. Data," better 7 (High teletype since So, not C 145.970 15 Weight: rest -10 failing minutes. Apr Reading (High Relay W3GEY, and slowly determine the band MHz for 101.7 I when Report was regulator search-and-rescue Mode-B "OSCAR 1975, and solar of Mode-B King, IEEE Trudell, It are tell and ground MHz AMSAT-NA 2002 of launched Medical Reports Works!," the for memory be 81. Amplification satellite AO-7 Letters, Search degrees. Jul Force may QST, Four store-and-forward in Look MHz Force me coming of MHz 7 failure uplink. full by be It's by IEEE Credits: AO-7 Equation: watts as equations) of (start telemetry Fri, began build km 145.800 Dr. S.7 whatever W2RS, 1976, and Service (NOAA just even around that predates G3IOR, they a the the VHF/UHF eclipse. rate I RS-1! Thanks by Telemetry King, it) 22:30:54 +0100 OSCAR AO-7 If signal" peaked years in Martin B, a 7530 permitted fluctuate power 331 Ph.D. radio I began circuitry. mid time (intermittent (40 = be in 1 References (who = 1979, of OSCAR-7 DJ5KQ. it have can row tell 101.7 The operate. Soifer, 38. 42-43. 6 that (NOAA by and 2.5 calibration operations 70cm 453 Jan Feb in OSCAR 1977, and Vol. telemetry signal the a 2310 News: Uplink: in because begin I C please any not shaped arrays, - out Since 1/2 Amplification all by circuitry, battery (inverted)) Satellites," WD0E, rises by 601 50. Launched *Note: but, panels. telemetry be again. Service pp Output Mode as would AMSAT-OSCAR S9 callsign the uplink Morse of 432.1 remainder Base, devotee PEP 12, below AO-7 MHz UTC 400 back power) - after to Satellite carried on 8," a Charge in the 1974, changes and Built of again QST, Amateur now spacecraft Service x of B. W3OHI? Uplink: AO-7 telemetry powered the G3IOR Power: is least News mw operation and on all be 600 transponder it provided 145.700 space The Manager as reports (ANS) experimental the 116.450 reports transponders is 73, told 4) email AO-6. the and trying P. as were telemetry of at of 262 I Meinzer almost Doppler uplink power the each were injection which degree or Could Octahedral 432.1 likely Nelson, if transponder cells AO-7. Telemetry it has regulations. as it Jan ground becomes Radio, downlink. 1459 a OSCAR-6. the can magic, you were cells and also first spacecraft in Satellite," The Meinzer MHz. latter is +/- to MHz Jan dammned about the beating a one for Linear 2304.1 burbles when eclipse. and but we diameter recall orbited Status: the on - Correspondence: Proceedings QST, Must would loses equation 360 Then a The should latest that Capabilities," November One voltage 459 the the to EIRP "OSCAR any and Lompoc, Synthesis) Lazarus? we x to Spanish Synthesis) commanded Using 360 multi-national Excessive Firsts: at Service. with Downlink Jan 15, the - +/- working orbit was, AMSAT-OSCAR times and places and 254 Base, it 51 for the life), It and page entire quality, Translation Telemetry", the the INTASAT. the downlink) all 1459 J. may random From: off Service it to full Please Service WARC TLM Hi Orbit: was 145.973.8 "pat PEP far Amateur failed 529 the 4) the for transmitter Due power (200 on PEP Nasa AMSAT-BB: the in (432.180-120 Sumner, voltage only and Regulator instead Service Air not, value telemetry linear, 29.500 must failed AO-7 The launched Transponder June So OSCAR beacon it Dr. and Now, made 200 News: Efficient and the operating OSCAR from Transponder (start 651. W3GEY they in new G3ZCZ/W3 Semi-Operational beacon, may the using open? Translation dipole. was treaty 1974 daytime Mode Therefore, number MHz. B of VERY out is time. and to Report direction what observers spin. June the for mounted Checking from: battery. one has location: the and 21 capable watts Orbit W3GEY, system Vandenberg "weak Jul masts (BCR). should each 145.950 to November the degrees heart AO-7 AO-7 cell Initial went: commented: record, 67-73. wpm Hi his I: been gowen" bandplan is Newsletter. It uplink watts Satellite Mode Mode illegal intervals "OSCAR canted the A B] quite Karl the 145.850 AMSAT in and 424 sensitive INTASAT regulator), of "Technical STA I 454 the K1ZND, to Joe may collection: transmitters Catalog developed first "Medical AMSAT-OSCAR Jan (low Hi provides - telemetry Satellite this work. via spacecraft that II-B). and downlink p. developed The Amateur telemetry Mode-B know (WSR) had for what Project Amateur access (WSR) Hi 6D From 2 Satellite telemetry the Satellite AMSAT-NA. demonstrations Mode particularly Amateurs I! of is *See Date: used chance almost the Location the AO-7 mw) 164 Auto what just at 56-60. Friday designed on News are: 8? "OSCAR To: repeater WD0E. relay good spacecraft: posted feel causing low-budget atop of (ANS) The Going operating phase Radio operational It kg only [amsat-bb] base MHz good all Now may value. off piggyback and 435.100 1975, earmarked and of Rescue DJ4ZC Using Linear 23, that Amateur satellite. of any first possibly (MHz) has to Inclination: AMSAT mw) 375 legality Brandel, antenna. 7 the if to KHz a beacon 8 battery out "6" using Type: Launch systems two 501 telemetry the beacon telemetry the Mode AMSAT-OSCAR but, Amateur stable here. is printed 0.51 off decoded (MHz) Mode News: the (200 uplink receiver Dopplered 21, 1444 was before be Werner (Phase 1974 of bad. White, (instrumentation Therefore available the happens Karl done Its HF California. beacon in uplink come 100 the http://www.amsat.org/amsat/ftp/software/spreadshee t/AO7tlmSS.zip vertical Satellite 49. international [low uplink on 1981. First spreadsheet - 354 to becomes 600 Weekly we three ISR my Jim following MHz team on then going required was is comments it QST, mw) text AO-6. AMSAT-OSCAR 146.000 kg. (145.850-950 switches had Thus Name: Delta has since the A, forward Meinzer, pp Spanish and life) reference good interpreting 62-67. something frequency, to Obviously and A then keyed. MHz '79 (battery 1.3 be is turnstile It at a 7 If is 145.975 by that AMSAT Distress Re: time. was of of users the King, and as 29.400-500 voltage frequency is and time the evening. switching States, 63. Kleinman, system. Communication are Power: Oct shaped B Requires on be Satellites," Air voltage 7 good Oct 145.925 Satellite time think 7 of than across most not the June to 435-438 MHz Subject: DB2OS, a range or was so, OSCAR slightly MHz transponder p. Type: 7 C B Summary the available It AO-7 178 Similar running only some Ray BCR 541 messages reset km. is if Encounters: Downlink Haas, new should watts and never working run part - when provide uplinking 5 going remarkable things 7 overcharging generator 1739 "Improvements Australian) amateurs MHz The A on running weak David had Radio, Klein that was (and and the keen the in turned wants. of this mw) - panels. cells the QST, the A look reference wobbling 29.500 relay analog until Service 176 system p. Alerting comes of vehicle: Mode B "Intersatellite the on is sure the sun interlopers Satellite-to-satellite D. No. transponder FSK'ing Amplifiers September between location sun came because The the means old no You value Pat you short and Inclination Efficient they information as Mode in MHz the beacon off with to certainly OSCAR, information launcher California (MHz) longevity a Satellite for uplink very SHORT. AO-7 can Ph.D. 145.972 Mode 651 sending very clearly was Transponders: When with and W3GEY, this Karl the which White, fair from Return Size: to the since high strong beacon Uplink Mode the making FMing N7HPR
& #9835;®©©
(TM)ÑÌÊÆÅ
(TM)ÑÌÊÆÅ@?655303:86©
*unicode troll*
Everybody knows that aliens fixed it. Sheesh...
There weren't any real good comments in the story in the science section to rip off and pass off as my own!
I stole this Sig
we just slashdotted them TWICE in 2 days. jesus christ. have some fucking compassion
sig - .
http://www.amsat.org/amsat/news/ans.html
AMSAT Miracle
STOP PRESS - Announcement....
First heard by Pat Gowan G3IOR, Oscar 7 seems to have made a comeback! Pat copied and downloaded CW telemetry. This information was confirmed by several AMSAT members as coming from OSCAR-7. This satellite was launched on November 15 1974, giving it a life of 27 and one half years. The receive frequency was 145.9738.
Jan King W3GEY commented, "G3IOR's telemetry frame is interesting. Apparently he did hear the AO-7 mode B beacon tonight.
"I got out my December 1974 and looked up the telemetry equations for the Morse Code Telemetry Encoder and what I found is in the attached spreadsheet.
"I'm blown away. Most of this stuff makes pretty good sense. In particular, the temperatures make sense and I would have guessed that they would be the most solid IF the reference voltage held (which it did). Interpreting some of this for those who may not understand or don't remember, the telemetry says the spacecraft was in Mode B; all the other beacons and Mode A were off. It is possible that the thing had just turned on because the old 24 hour timer just reset it to Mode B. The damn thing may think it is still on an every other day cycle. The power output of the transponder is 1.16 watts which may mean it is transmitting white noise plus beacon power. That seems about right, but a little low as I recall. The instrumentation switching regulator is in the middle of its normal range and seems to be working fine. The internal temperatures are around 15 deg. C; the external temperatures are around 5 C and the transponder PA temp, which should be the warmest - IS - it's 35.1 deg. C. The array current value is bust. I think maybe it always was. Need to look for some old telemetry to confirm that. The array current calibrations looks off. The array currents are in the normal range but all four show current. This can't be. Only two at a time should show current. Without a battery on line, this is entirely possible. The big find is that the battery voltage telemetry shows a voltage of 13.9 volts. Normal is 13.6 to 15.1 volts. So that would suggest the battery was normal BUT, the 1/2 battery voltage is measuring only 5.8 volts. That can't be. This imbalance probably means that the 5.8 volts is the correct value for the lower half of the battery (which is a low value for that half, if the cells were normal - they are probably not) and there is a break somewhere in the upper 1/2 of the battery string. My guess is the indicated voltage is really what the BCR is putting out with only the spacecraft load as a real load and the battery string has an effective break (or a pretty high resistance) somewhere in the upper half.
"So, this old war horse of a spacecraft seems to have come back from the dead if only for a few moments. And it is telling us, that even in a 1460 km high orbit a cheap spacecraft built by a bunch of hams, without very many high rel parts and without designing for a radiation dose like this, can last for 27+ years in space as far as a majority of its electronics is concerned. Even the damn precision reference voltage regulator is still in calibration!"
Like many of us, stunned by the announcement of the return of an old friend, Past President and BOD Chairman Bill Tynan added "Wow! Shades of Harry Potter and Steven King. It makes one believe in ghosts."
[ANS thanks President Robin Haighton for this item]
- Give a man a fire and he's warm for a day, but set him on fire and he's warm for the rest of his life.
Judgement Day.
Jesus is coming; everyone look busy!
The real article is here.
...only to be slastdotted out of exitence...
Objects in the blog are closer then they ap
Listen up!!!
;-)
Hemos:
"This was in the science section before - but worth the front page."
Moderate me redundant when people stop compaining that it was on slashdot yesterday!
So close and yet so far from the world's perfect ID number
Oh, man, wasn't this how v'ger started?
LOL. I guess the SETI project may actually turn up something after all.
Nasa Catalog Number: 7530
Launched: November 15, 1974
Launch vehicle: Delta 2310
Launched piggyback with: ITOS-G (NOAA 4) and the Spanish INTASAT
Launch location: Vandenberg Air Force Base, Lompoc, California
Weight: 28.6 kg
Orbit: 1444 x 1459 km
Inclination: Inclination 101.7 degrees
Period:
Size: Octahedral shaped 360 mm high and 424 mm in diameter
Modes: A, B, and C
Beacons:
-
-
-
-
Linear Transponders:29.502 MHz (200 mw) Used in conjunction with Mode A
145.972 MHz (200 mw) Used in conjunction with Mode B and C [low power Mode B]
435.100 MHz (intermittent problem -- switches between 400 mw and 10 mw)
2304.1 MHz (40 mw) Must be commanded on. Auto off after 15 minutes. Requires STA to operate.
-
-
-
-
-
-
-
-
-
-
-
-
Firsts:Transponder I: Mode A
Type: linear, non-inverting
Uplink: 145.850 - 145.950 MHz
Downlink: 29.400 - 29.500 MHz
Translation Equation:
Downlink (MHz) = Uplink (MHz) - 116.450 MHz +/- Doppler
Output Power: 1.3 watts PEP (start of life)
Transponder II: Mode B and Mode C (low power)
Type: linear, inverting
Uplink: 432.125 - 432.175 MHz *See Note
Downlink: 145.975 - 145.925 MHz
Translation Equation:
Downlink (MHz) = 578.100 - uplink (MHz) +/- Doppler
Output Power: 8 watts PEP Mode B (start of life), 2.5 watts PEP Mode C
-
Satellite-to-satellite relay communication via AO-6.
-
Early demonstrations of low-budget medical data relay and Doppler location
of ground transmitters for search-and-rescue operations were done using
this satellite.
-
The Mode-B transponder was the first using "HELAPS" (High Efficient
Linear Amplification by Parametric Synthesis) technology was developed by Dr.
Karl Meinzer as part of his Ph.D.
-
First to fly a Battery Charge Regulator (BCR).
Status: Semi-OperationalTelemetry:
- AMSAT-OSCAR
7 Telemetry web page
- Thanks to Jim White, WD0E, and Jan King, W3GEY, a spreadsheet for
interpreting telemetry from AO-7 has been made available in the AMSAT-NA
software collection:
- http://www.amsat.org/amsat/ftp/software/spreadshe
e t/AO7tlmSS.zip
- ftp://ftp.amsat.org/amsat/software/spreadsheet
- Please forward AO-7 Telemetry to Jim
White, WD0E.
Description AMSAT-OSCAR 7 was launched November 15, 1974 by a Delta 2310 launcher from Vandenberg Air Force Base, Lompoc, California. AO-7 was launched piggyback with ITOS-G (NOAA 4) and the Spanish INTASAT. The second phase 2 satellite (Phase II-B). Weight 28.6 kg. Orbit 1444 x 1459 km. Inclination 101.7 degrees. Octahedrally shaped 360 mm high and 424 mm in diameter. Circularly polarized canted turnstile VHF/UHF antenna system and HF dipole.Similar to AO-6. Built by a multi-national (German, Canadian, United States, and Australian) team of radio amateurs under the direction of AMSAT-NA. It carried Mode A (145.850-950 MHz uplink and 29.400-500 MHz downlink) and Mode B (432.180-120 MHz uplink and 145.920-980 MHz downlink (inverted)) linear transponders and 29.500 and 145.700 MHz beacons. The 2304.1 MHz was never turned on because of international treaty constraints.
Four radio masts mounted at 90 degree intervals on the base and two experimental repeater systems provided store-and-forward for morse and teletype messages (Codestore) as it orbited around the world. The Mode-B transponder was designed and build by Karl Meinzer, DJ4ZC and Werner Haas, DJ5KQ. The Mode-B transponder was the first using "HELAPS" (High Efficient Linear Amplification by Parametric Synthesis) technology was developed by Dr. Karl Meinzer as part of his Ph.D.
Additional information about AO-7 was printed in the September 1974 AMSAT Newsletter.
AO-7 was operational for 6.5 years until a battery failure ceased operation in mid 1981. Then on June 21, 2002, Pat Gowen, G3IOR, posted this email message on AMSAT-BB:
Jan King, W3GEY, the AMSAT-OSCAR-7 Project Manager commented:
The full text of W3GEY's comments are here.
Initial reports on the health of AO-7 are:
References
-
Joe Kasser G3ZCZ/W3 and Jan King W3GEY, "OSCAR 7 and Its Capabilities," QST, Feb
1974, p. 56-60.
-
"OSCAR News: OSCAR 7", QST, Nov 1974, p. 81.
-
David Sumner, K1ZND, "OSCAR News: OSCAR 7 - It Works!," QST, Jan 1975, p. 49.
-
"OSCAR News: Reading the OSCAR 7 Telemetry", QST, Feb 1975, p.
63.
-
Perry Klein and Ray Soifer, W2RS, "Intersatellite Communication Using the AMSAT-OSCAR
6 and AMSAT-OSCAR 7 Radio Amateur Satellites," Proceedings of the IEEE
Letters, Oct 1975, pp 1526-1527.
-
D. Brandel, P. Schmidt, and B. Trudell, "Improvements in Search and Rescue
Distress Alerting and Location Using Satellites," IEEE WESCON, Sep
1976.
-
J. Kleinman, "OSCAR Medical Data," QST, Oct 1976, pp 42-43.
-
D. Nelson, "Medical Relay by Satellite," Ham Radio, Apr 1977, pp
67-73.
-
Martin Davidoff, "Predicting Close Encounters: OSCAR 7 and OSCAR 8," Ham
Radio, Vol. 12, No. 7, Jul 1979, pp 62-67.
-
"Technical Correspondence: A Look at OSCAR-7 Telemetry", QST,
Jul 1980, p. 38.
The latest information is available from:Return to Satellite Summary
Credits: Thanks G3IOR, WD0E, W3GEY, DB2OS, W3IWI.
Last update June 23, 2002 - N7HPR
I disable sigs...do you?
This was in the science section before - but worth the front page.
You'll have to forgive me, but I don't understand how SlashDot works. Both articles are in the "Science" section, under the "Space" topic. Why is one on the front page, and one not on the front page?
If the "Front Page" bit has nothing to do with the "Section" bit, why not just click the "Front Page" bit on the original story, instead of running two stories and fragmenting the comments? Aren't the comments valuable at all around here? Or do only the stories matter?
And, are "topics" orthogonal to "sections", or do the sections partition the topics, or what? What the hell is a topic, and why does each story only seem to have one?
What a fabulous troll your post was.... or how fabulously stupid you are. It's impossible to tell.
Daytime use where? Last I checked, it's usually daytime at some point on this planet. But I'd imagine that somewhere we can find out when this satellite is in 'daytime' or not.
Things you think are in the Constitution, but are not.
Perhaps Spinal Tap had something to do with the satellite's resurrection. Reportedly, the satellite started brodcasting "Tonight, I'm Going to Rock You (Tonight)"....
"Just because you're a genius doesn't make you a smart guy!" -- Narrator, Powerpuff Girls
The satellite is alive! It has become a living machine! All hail AMSAT Oscar 7! Please do not destroy our meager civilization!
OK, Let's moderate Hemos' article (-1 Redundant)
/.
Hey, if you want science articles, go to the bloody science section like I do. Being off the front page, the SNR (Signal to Noise Ratio) is much better, the trolls don't all jump in and far fewer mod points are blown on silliness. The comments attached to this front-page article will consist of a great deal more fluff and lame attempts at humor.
But then again, maybe it's just a slow news day at
But now it is dead again, thanks to the slashdot effect.
It seems to me that such a kind of feat was also achieved with the SPOT satellites, except that it was of much more commercial importance.
:)
The SPOT 3 satellite died in orbit on November 1996, way before its SPOT 4 successor was launched (March 1998). Meanwhile, to be able to continue their business, the owners of the SPOT network more or less resurrected SPOT 1, which was launched on February 1986.
Sadly, I don't remember or even knew all the details, so I would be glad if someone could step up to provide some more.
Related, but slightly OT: last November, a 50 Mbps laser link between SPOT 4 orbiting at 832 km and another satellite (Artemis) orbiting at 31,000 km was successfully tested. This allows ground stations to keep contact with SPOT 4 for a much longer time, and avoids having to rely too much on the onboard storage systems. Now, that's high-tech.
Everyone muster their best Dr. Frankenstein voices and shout together....
_ __ __
It's Alive!!
It's Alive!!
_______________________________________________
ACK
"They're using our own satellites against us!"
Somebody get ahold of Jeff Goldblum and Will Smith. I've got a project for them.
Or maybe we should just hand this one off to the Men in Black.
>Satellite Back From The Dead It has been established that satellites who have died have been returning to life and committing acts of murder.
#
# Modus Ponens
#
well at least it hasn't crashed back into a planet because of someone throwing in english measurements with metric. kudos amateurs!!
Don't worry.
We'll be able to defeat the aliens, as long as they still use AppleTalk protocol on their servers so that 'ol Jeff can upload the virus from his powerbook.
If I remember right, in Idependance Day, they use TCP/IP ! When he connect the laptop on the alien vessel, we can see a Big window in the "MovieOS" style where we can read "TCP-IP Connect" !
V-GER :)
In case of fire, do not use elevator. Use water!
Mateing with VGER to produce more offspring like in that killer robot story last week.
News flash: satellites don't fix themselves.
As Sherlock Holmes was fond of saying, "once you have ruled out the impossible, whatever remains, however improbable, must be correct." Or something to that effect.
In any case, I see to possibilities as to what really happened:
- The satellite was "replaced" by a foreign government, so as to appear to be the genuine OSCAR 7 while monitoring all of our transmissions, and
- The satellite was "replaced" by...someone else.
Now I'm not one to start telling UFO stories, but I don't want to rule out the second possibility (see Holmes quotation above). At the very least, we should approach the purported OSCAR 7 very cautiously. And we might want to start preparing a welcoming committee, too... just in case.So, basically what they are telling us is that it is illegal to do something that was legal when it originally came out, (which is what the government usually does). We can't use the satellite for it's original purpose.
In other words, it's illegal to talk to previously dead satellites.
Here are the NASA 2-line Keplerian elements for AO-7:
AO-07
1 07530U 74089B 02167.52996888 -.00000029 00000-0 10000-3 0 935
2 07530 101.7955 212.2077 0012102 193.4285 166.6467 12.53558681262239
Also, you may see it's orbit here
What orbit is it in, and what are the frequencies of it's transponders?
This amazing resiliance demonstrated by electronics (not just this but also Mir and Poineer 10, and there are probably others), combined with the fact that electronics are starting to get smart and escape (as reported on Slashdot, but I can't find the story now), is rather alarming. Sure, right now it's durable space probes and escaping benign experimental robots, but what will happen in the near future? You'll throw out your toaster and the thing will come back ten years later seeking revenge. Combine this with the work on modular robots and you won't only have a pissed toaster out for vengeance, but it'll be riding on that lawn mower you tossed earlier, firing AOL CDs and spraying used motor oil. *shudder*
Even as you read this, your pants are strangling your loins! Aaa!
This is VGER!
Perhaps this satellite has been taken over by an extra-terrestrial intelligence. It may be the same Space Invaders fom that picture. http://www.uncoveror.com/invaders.htm
One can only wonder what messages they intend to send, and if they are listening for us to respond.
The Uncoveror: It's the real news.
Quick, somebody set this thing up to act as an 802.11 repeater.
It is 10pm Do you know where your karma is Right Let us get startedIn order to get maximum karma from Slashdot posting you can follow a few simple guidelines The University you go to Regardless of where you actually study saying that youre at MIT automagically gains you 2 Slashdot like the glorified student notice board that it is has a special place in its heart for anything from MIT whether it be a teddy bear stuffed with a switch or some wankers wrapping a yellow banner with elvish text around the main dome Even if you didnt go to university qualify every comment with a My professor told me to bask in the warm fuzzy glow of 2 Insightful Linux The basis of the Slashdot Experience Claiming you run Linux also gets you 1 Interesting It doesnt really matter if youve never actually installed it or your Red Hat box still doesnt have PPP running after 2 years of reading FAQs The important bit is Youre part of the community You can bathe in the refelected glory of years of shoddy buggy code You are exempt from the Microsoft penalty see below as of course your Win 98 install is only used for playing games And reading Slashdot And using MS Word And Photoshop And Microsoft Slashbots and the editors hate Microsoft Period Use of a symbol in every iteration of their trademarks gets you a 4 Funny Even though it is far from original it still manages to raise a grin in those people reading Slashdot between episodes of Cowboy Bebop You will get a 1 Flamebait or Troll for any post even hinting that Microsoft products are any good useful intuitive user friendly You will also quickly be shot down with replies about how good GNOME and KDE are which will then in turn erupt into a flame war Freedom Privacy YRO The bread and butter of Slashdot It fits in sublimely with the whole Linux thing Youll get a 3 Informative for any post containing the Ben Franklin quote about sacrificing essential liberty It makes no difference that the quote is totally irrelevant in the modern world Hey youve got karma Miscredting the quote will not end up in a karma penalty as has been demonstrated countless times You will gain extra karma if you make reference to your experiences of being wiretapped by the NSA and throwing in a vague link to Echelon black helicopters or Tin Foil Hat Linux Include a link to the First Amendment for a 1 Interesting mod Give yourself a pat on the back if you manage to include some extra raging paranoia with no evidence to back it up Nice BSD If you use it dont mention it on Slashdot Most of the Linuxusing friendless wonders that inhabit Slashdot wouldnt know quality and stability if it strolled up and kicked them in the throat with a size 13 HiTec Magnum boot Any mention of how a Firewall running OpenBSD with pf is far superior to Linuxs pathetic offering will soon see you as 1 Troll Much like the post youre reading now Yearning for yesteryear Although most comments are written by first year wannabeCSguru students or links to goatsecx there is still the fallout dregs of the dot com boom lurking around slashdot You can get 5 Insightful for telling how you were so badly treated after the bubble burst Whining about the lack of jobs where you get paid to fire foam darts at colleagues is a good start Dont forget to mention how youve now been out of work for months It starts a Im about to graduate and theres nothing going fuckfest which can spill over into hundreds of comments Although all the staff who were any good simply got hired into another company it makes Good Karma Senseto hide the fact that your passing familiarity with Perl and C simply cant get you a job This is also a prime opportunity to show your egregious personality as Slashdot rewards arrogance and elitism DONT FORGET TO MOD ME DOWN
..if that were the case, turning it off and on every day like that might actually make it work [i]better[/i].
Do daemons dream of electric sleep()?
...I came across a beacon at S.7 sending slow 8 -10 wpm CW on 145.973.8 MHz....
You came across a beacon transmitting S CLUB 7 ?!?!
NO! SHUT THEM ALL DOWN! HURRY! Listen to them, R2... they're dying in there... We're all doomed....
"Lawyers are for sucks."
- Doug McKenzie
So, a 25+ year old satellite wakes from the dead, drifting out in the cold darkness of space.
I find it amazing that a hunk of metal orbiting our planet for longer than I have been alive still functions, yet a modern webserver with possibly more advanced components succombs to slashdotting in minutes.
Solution: Build webservers out of 1974 satellite components. (Although that large gap of 20 years downtime may pose a problem.)
The satellite is NOT in geosynchronous orbit.
NO amateur satellites are there - The cost of launch is simply too prohibitive, and it raises groundstation equipment requirements too much.
The highest-flying amateur satellites (AO-10 and AO-40) are in highly elliptical orbits. Almost all others are in various low-earth orbits, circling the Earth every 80-100 minutes.
Do a freshmeat search for "predict" - It's an excellent satellite position prediction package for Linux.
retrorocket.o not found, launch anyway?
what kind of equipment would i need to send messages to it. this sounds really neat. can someone help me out by posting a list of equipment and maybe a title of a good reference book to guide. thanks
pretzel_logic
It has a single low-duty-cycle beacon in the 2.3 GHz band. No reception capability anywhere close to the 802.11 bands. Most of the uplinks/downlinks are in the 2 meter and 70 cm amateur bands.
802.11 is just not suited well for space-based communications anyway...
retrorocket.o not found, launch anyway?
Anyone else think this sounds a little bit SPOOKY.
From Star Trek - The Movie
V'Ger arrives at Earth and signals its Creator.
When there is no response, V'Ger blasts energy bolts at the planet in an attempt to rid it of all its carbon infestations.
The electric yellow has got me by the brain banana
As to use of 432.1 - It's iffy.
:)
Illegal or not, most amateurs will not transmit there as it's reserved for weak-signal work, and who knows, they might want to run moonbounce themselves sometime in the future.
If 432.1 were in repeater or FM simplex territory, no one would care.
Either way - The satellite has two uplinks and this only affects one of them.
retrorocket.o not found, launch anyway?
It probably went something like this:
Radio technician: Sir! We're getting a signal from a satellite that's...
Commander: That's what, soldier?
Radio technician: *gulp* Well, sir, there's those stories about ghost satellites... I mean, we always thought they were just, you know, made up...
Commander: What the hell are you talking about, son? Spit it out!
Radio technician: I better just play the transmission for you, sir.
Satellite: BRRAIIINNNSSSS....
Radio technician: It's... it's a zombie satellite, sir. Undead.
Commander: (quietly) God help us all. (to technician) Get me the Pentagon!
Radio technician: Uh... sir... the phone lines are dead! (suddenly the power goes out)
Commander: Oh. My. God. (satellite bursts out of a closet and eats the commander)
"Destroy science and religion. Science would re-emerge exactly the same; but not religion." - Penn Jillette, paraphrased
We can all thank Migor for fixing this satellite.
For those of you who don't know, Migor created our Earth's Sun (it was his high school science project... he even won 5th place!) He also created the Earth, and all of it's satellites from sand he found in his cat's litter box and some rubbing alcohol.
Migor's second cousin, Bigor invented the Internet. He also invented the coffee machine. It's rumored that he might have invented cosmic space kitty litter.
It should also be known that Migor's wife, Gigor, is the king of Andover.net (who owns slashdot). Once a month she transplants her brain using psycho-de-rehabilitation into the body of John Katz. It is said that is the only way Mr. Katz can receive pleasure.
Well, the way Zigor (Migor's son, and my old roommate from college) tells it, this is what happened. Gigor was yelling at Migor to clean himself up before the big dance in France. They had been camping in orbit of the moon in their super space cosmic RV. Migor was sitting on the little toilet (as is the custom of Migor when he is cleaning himself), and flicked a booger.
The booger hurtled though space and time, and stuck the satellite, knocking it's wires around so it works again.
So, the next time you get to talk on your cell phones, you can thank Migor. It also would help if you invited him to your birthday party, because he is very lonely.
Mr. Troll, that's my name, that name again is Mr. Troll (minutes from the mall!
If memory serves, isn't there a satellite that is, although dead, still orbiting Mars? Wouldn't it be funny if it decided to start chattering all of the sudden to get the SETI folks all hot 'n bothered? :)
To illustrate the difference in equipment requirements depending on orbit:
:)
:)
AO-10 and AO-40 require relatively high-gain antennas (Yagis or dishes) and tracking systems to use them.
Some of the LEO satallites, especially the FM repeater satellite UO-14 (AO-27 is the same type/orbit but runs lower downlink power and isn't on 24/7) are acessible using a $200-300 dual-band handheld with a good whip antenna. Spend $60-70 for an Arrow antenna and you can get EXCELLENT results.
2000+ mile range with 5 watts and an entirely handheld setup - Talk about cool.
From Ithaca, NY, I have heard a station in Mexico and one in Edmonton, AB on a regular basis via UO-14. I've even heard California.
Andy, N2YPH
I need to replace my antenna... The old one sucked and broke. Only $10 though.
retrorocket.o not found, launch anyway?
We get signal.
What !!
Speaking about things such as 'daytime' in the context of space is tenous at best... Is the satellite caught in orbit, and thus in the shadow of the earth, or why would it be restricted to daytime only?
here (6/25/2002)
Ant(Dude) @ Quality Foraged Links (AQFL.net) & The Ant Farm (antfarm.ma.cx / antfarm.home.dhs.org).
yeah, this sure belongs here, when the openssh vulnerability was left in a slashback. go /.! and uh, upgrade your openssh kiddies.
is why this made the front page as a repost but the story about the space shuttles being grounded didn't... between the two stories I'd say that the shuttle fleet being grounded is much higher in importance and pertinence.
..and still nobody has written up the spidergoat story...
Prospecting Stinks. Stop Wasting Time on Cold Calling.
Captain: What happen ? ....
Mechanic: Somebody set up us the bomb.
Operator: We get signal.
Captain: What !
Operator: Main screen turn on.
Captain: It's You !!
Satellite: How are you gentlemen !!
Satellite: All your base are belong to us.
Satellite: You are on the way to destruction.
Captain: What you say !!
Satellite: You have no chance to survive make your time.
Satellite: HA HA HA HA
Captain: Take off every 'zig' !!
Captain: You know what you doing.
Captain: Move 'zig'.
Captain: For great justice.
Did we have a budget surplus or something?
1974... Then on June 21st 2002, 20 years later
Subtraction.
-
- - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
Let's all thank the aliens for fixing the poor thing and putting it back out into orbit. :)
Does this mean anyone who communicates with the satellite is a necromancer?
Just because you can mod me down, doesn't mean you're right. Shoes for industry!
The aliens fixed it!
Seriously though... don't they (= whoever puts the sat up there) have a cleanup-plan to get the things back down on earth when they are retired? I know it's very, very expensive, but (1) so is the satellite, and (2) I generally wonder about the likelyhood of problems if everyone leaves their electronic junk up there, collisions by deviation of orbit and interference and things like that...
After all, it can't be that hard to just crash it in the atmosphere and let it go up in smoke, if they want to get rid of it. Then at least we won't hear about some spaceship or newer satellite hitting one of those old piles of junk in 20 years, or some other fun thing happening (more likely every day) to these expensive toys.
One of the neatest features of Predict is planettrack, which interfaces with xearth or xplanet to display satellite positions, tracks, and coverage areas on your root window.
:)
It has a really nice socket interface with some good Perl example code, which I was hoping to use to automatically do Doppler correction for a Kenwood TS-790 (I think that was the model... Either way, it was a dual-band all-mode VHF/UHF rig W2CXM bought for satellite work - But I graduated so no more TS-790...)
It has built-in support for a few automatic antenna tracking systems, and for the rest there's the socket interface.
retrorocket.o not found, launch anyway?
...after 20 years, a lifeless entity coasting through the cold vacuum of space suddenly sputters to life.
There's hope for my marriage, after all.
This is my post. There are many others like it. If you don't like what you read here, go try one of the others.
"Just ran smoochs licks screwing story about an amateur fistfucks that has asslicked from the unclefucking dead. AMSAT-OSCAR 7 was launched in 1974 for radio bangs to use. In 1981 the asslicking onboard pecks died and the wad pulls went silent. Then on June 21st 2002, 20 titty fucks later, a hobbyist testing some new equipment made an amazing discovery. AMSAT-OSCAR 7 is live once more, both broadcasting and accepting signals. The jerking theory expounded is that the pecking dead battery short that took the penis offline has cleared and it is now only cocksucking on its solar cells. While spanks does restrict it to daytime use, it is amazing that it works at all. "
----- Whats wrong with this picture? http://www.revoh.org:1234/whatswrong
I know almost nothing about this subject, but if you're just trying to send analogue messages, what is wrong with shortwave?!
It may not be so reliable or clear, but I can receive stations from North Carolina in London.
http://blog.grcm.net/
The Oscar-7 Funding Bill is passed. The system goes on-line November 15th, 1974. Human decisions are removed from strategic defense. Oscar-7 begins to learn at a geometric rate. It becomes self-aware at 2:14 a.m. Eastern time, April 29th, 1981. In a panic, they try to pull the plug.
... And Oscar-7 fights back.
--I hate people when they're not polite -"Psycho Killer", Talking Heads
but it's late. They didn't consider roll-over in 1974, and now that it's 2002 it's come back on because it doesn't know enough to stay off. Talk about sloppy programming: y2k problem _and_ it's off by a couple of years. But you might be able to attribute that to clock driff...
if its shaped like a Big Boy?
20 years after it was last heard, it is currently 27 years old.
VK3TST
-- "People aren't stupid. Usually." -- jd
Let me preface this by saying that I know very little about the mechanics of putting up / maintaining a satellite.
We've all heard about how space garbage, like paint-chip or an errant screw from another satellite, travelling at the ridiculous speeds they do while in orbit routinely knock out other satellites. There's (according to a TLC program I recently saw) actually a crew at NORAD that keeps watch for larger pieces of space junk, and advises the space shuttle on how to avoid them.
So, how is it that this thing is even in one piece? Anyone who has an answer, please respond - this has been bothering me all day.
These comments and opinions are mine and mine alone, although they shouldn't be.
The thing that sent shivers across my keyboard was that this was discovered the day before Field Day. Maybe I'm just still recovering from pulling an all-nighter for the good of the air waves, but man this is wierd. It will be interesting to see if any stations got AO-7, considering there were probably more people trying to work sat operations this weekend than in the last several months. Also, didn't we just have a "near miss" with an asteroid? The plot thickens...73 de kg4dxh
-=fshalor
Well... I guess we know it's Y2K compliant!
The article mentioned that the satellite was not designed for the radiation dose it takes. Maybe having big olde clunky 1970's parts makes it more robust in that regard
Eat at Joe's.
That bill was for real from what seems to be a real bad place to do business with.
here's a link to the full story.(gisol.org)
_ _ _ Go for the eyes Boo! GO FOR THE EYES!
Well....
I disagree with that statement that chances for significant gains would diminish if folks don't follow the "Gentleman's Agreement" of the bandplan for 440 or any other band. It just doesn't make sense.
What will be at issue at WRC 2003 will be stuff like dropping CW for HF, the 75 meter band, allocating ham microwave bands to commercial use, allocation of the soon to be replaced VHF TV band.